Aqueous dispersion of polyurethane nanocomposites based on calix[4]arenes modified graphene oxide nanosheets: Preparation, characterization, and anti-corrosion properties

•WPU/GOs nanocomposites were prepared based on BC4A and SC4A modified GO nanosheets.•Modification of GO overcomes the coagulation problem of the WPU/GO dispersion.•Modification of GO also affords better mechanical properties to nanocomposites.•WPU/CGO coating exhibited the highest adhesion strength after three weeks immersion.•WPU/CGO coating showed the best anti-corrosion performance on the mild steel.